Compound, photosensitive fluorescent resin composition comprising same, color conversion film prepared using same, backlight unit, and display device

ABSTRACT

The present specification relates to a compound represented by Chemical Formula 1, a photoresist fluorescent resin composition including the same, and a color conversion film manufactured using the same, a backlight unit and a display apparatus.

TECHNICAL FIELD

The present specification claims priority to and the benefits of KoreanPatent Application No. 10-2019-0087011, filed with the KoreanIntellectual Property Office on Jul. 18, 2019, the entire contents ofwhich are incorporated herein by reference.

The present specification relates to a compound, a photoresistfluorescent resin composition including the same, and a color conversionfilm manufactured using the same, a backlight unit and a displayapparatus.

BACKGROUND ART

Existing light emitting diodes (LED) are obtained by mixing a greenphosphorescent substance and a red phosphorescent substance to a bluelight emitting diode, or mixing a yellow phosphorescent substance and ablue-green phosphorescent substance to a UV light emitting diode.However, with such a method, it is difficult to control colors, andtherefore, color rendering is not favorable. Accordingly, color gamutdeclines.

In order to overcome such color gamut decline and to reduce productioncosts, methods of obtaining green and red in a manner of filming quantumdots and binding the dots to a blue LED have been recently tried.However, cadmium series quantum dots have safety problems, and otherquantum dots have significantly decreased efficiency compared to cadmiumseries quantum dots. In addition, quantum dots have reduced stabilityfor oxygen and water, and have a disadvantage in that the performance issignificantly degraded when aggregated. Furthermore, unit costs ofproduction are high since, when producing quantum dots, maintaining thesizes to be constant is difficult.

Existing compounds having a BF₂ or B(CN)₂-based bodipy structureprovides, as a fluorescent dye having high light efficiency and a narrowfull width at half maximum, excellent light properties when used in acolor conversion film, but has insufficient light resistance and heatresistance to be commercialized, and development of compounds havinghigh durability has been required.

DISCLOSURE Technical Problem

The present specification is directed to providing a compound, aphotoresist fluorescent resin composition including the same, and acolor conversion film manufactured using the same, a backlight unit anda display apparatus.

Technical Solution

One embodiment of the present specification provides a compoundrepresented by the following Chemical Formula 1.

A1 to A4 are each independently a substituted or unsubstituted arylgroup, or a substituted or unsubstituted heterocyclic group,

X1 and X2 are each independently O, NH or NR′,

R′ is a substituted or unsubstituted alkyl group, a substituted orunsubstituted cycloalkyl group, a substituted or unsubstituted arylgroup, or a substituted or unsubstituted heterocyclic group, or bonds toadjacent groups to form a ring,

R1, R2, R4 and R5 are each independently hydrogen, a hydroxyl group, asubstituted or unsubstituted alkyl group, a substituted or unsubstitutedcycloalkyl group, a substituted or unsubstituted alkoxy group, asubstituted or unsubstituted aryl group, or a substituted orunsubstituted heterocyclic group,

R3 and R6 are each independently a hydroxyl group, a halogen group, asubstituted or unsubstituted alkyl group, a substituted or unsubstitutedcycloalkyl group, a substituted or unsubstituted alkoxy group, asubstituted or unsubstituted amine group, a substituted or unsubstitutedaryl group, or a substituted or unsubstituted heterocyclic group,

L1, L2, L4 and L5 are each independently a direct bond, S, or asubstituted or unsubstituted alkylene group,

B3 and L6 are each independently a direct bond, a substituted orunsubstituted alkylene group, or a substituted or unsubstituted arylenegroup,

when R3 is a substituted or unsubstituted alkyl group, X1 is NH or NR′,

when R6 is a substituted or unsubstituted alkyl group, X2 is NH or NR′,

I1 to I6 are each 1 or 2, and

when I1 to I6 are each 2, structures in the parentheses are the same asor different from each other.

Another embodiment of the present specification provides a photoresistfluorescent resin composition including a binder resin; a polymerizablecompound including an ethylenically unsaturated bond; and the compounddescribed above.

Another embodiment of the present specification provides a colorconversion film including a cured material of the photoresistfluorescent resin composition described above.

Another embodiment of the present specification provides a backlightunit including the color conversion film described above.

Another embodiment of the present specification provides a displayapparatus including the backlight unit described above.

Advantageous Effects

A compound according to one embodiment of the present specification iscapable of high color reproduction.

A compound according to one embodiment of the present specification hashigh solubility.

A compound according to one embodiment of the present specification hashigh light resistance.

DESCRIPTION OF DRAWINGS

FIG. 1 is a mimetic diagram of using a color conversion film accordingto one embodiment of the present specification in a backlight unit.

FIG. 2 is a mimetic diagram illustrating a structure of a displayapparatus according to one embodiment of the present specification.

MODE FOR DISCLOSURE

Hereinafter, the present specification will be described in detail.

One embodiment of the present specification provides a compoundrepresented by Chemical Formula 1.

Existing perylene derivatives have a limitation in high colorreproduction since absorption and emission wavelengths thereof are shortwavelengths, and have a disadvantage of having weak light resistance.

Meanwhile, the compound according to one embodiment of the presentspecification is capable of high color reproduction by absorption andemission wavelengths moving to long wavelengths compared to existingperylene derivatives. Specifically, the compound of the presentapplication is capable of high color reproduction by absorption andemission wavelengths moving to long wavelengths and therebyaccomplishing a wider range of color coordinates compared to existingperylene derivatives.

The compound according to one embodiment of the present specificationhas high light resistance. Specifically, the compound of the presentapplication has superior light resistance by having an electronwithdrawing group at the imide position compared to existing perylenederivatives.

In the present specification, a certain part “including” certainconstituents means capable of further including other constituents, anddoes not exclude other constituents unless particularly stated on thecontrary.

In the present specification, one member being placed “on” anothermember includes not only a case of the one member being in contact withthe another member but a case of still another member being presentbetween the two members.

In the present specification, an “adjacent” group may mean a substituentsubstituting an atom directly linked to an atom substituted by thecorresponding substituent, a substituent sterically most closelypositioned to the corresponding substituent, or another substituentsubstituting an atom substituted by the corresponding substituent. Forexample, two substituents substituting ortho positions in a benzenering, and two substituents substituting the same carbon in an aliphaticring may be interpreted as groups “adjacent” to each other.

Examples of substituents in the present specification are describedbelow, however, the substituents are not limited thereto.

The term “substitution” means a hydrogen atom bonding to a carbon atomof a compound being changed to another substituent, and the position ofsubstitution is not limited as long as it is a position at which thehydrogen atom is substituted, that is, a position at which a substituentcan substitute, and when two or more substituents substitute, the two ormore substituents may be the same as or different from each other.

The term “substituted or unsubstituted” in the present specificationmeans being substituted with one, two or more substituents selected fromthe group consisting of deuterium; a halogen group; a cyano group; anitro group; a hydroxyl group; an imide group; an amide group; asubstituted or unsubstituted amine group; a substituted or unsubstitutedsilyl group; a substituted or unsubstituted alkyl group; a substitutedor unsubstituted cycloalkyl group; a substituted or unsubstitutedhaloalkyl group; a substituted or unsubstituted alkoxy group; asubstituted or unsubstituted alkenyl group; a substituted orunsubstituted alkynyl group; a substituted or unsubstituted aryl groupand a substituted or unsubstituted heterocyclic group, or beingsubstituted with a substituent linking two or more substituents amongthe substituents illustrated above, or having no substituents.

In the present specification, examples of the halogen group may includefluorine, chlorine, bromine or iodine.

In the present specification, the number of carbon atoms of the imidegroup is not particularly limited, but is preferably from 1 to 30.Specifically, compounds having structures as below may be included,however, the imide group is not limited thereto.

In the present specification, in the amide group, nitrogen of the amidegroup may be substituted with hydrogen, a linear, branched or cyclicalkyl group having 1 to 30 carbon atoms, or an aryl group having 6 to 30carbon atoms. Specifically, compounds having the following structuralformulae may be included, however, the amide group is not limitedthereto.

In the present specification, the amine group may be selected from thegroup consisting of —NH₂; a monoalkylamine group; a dialkylamine group;an N-alkylarylamine group; a monoarylamine group; a diarylamine group;an N-arylheteroarylamine group; an N-alkylheteroarylamine group, amonoheteroarylamine group and a diheteroarylamine group, and, althoughnot particularly limited thereto, the number of carbon atoms ispreferably from 1 to 30.

In the present specification, the N-alkylarylamine group means an aminegroup in which N of the amine group is substituted with an alkyl groupand an aryl group.

In the present specification, the N-arylheteroarylamine group means anamine group in which N of the amine group is substituted with an arylgroup and a heteroaryl group.

In the present specification, the N-alkylheteroarylamine group means anamine group in which N of the amine group is substituted with an alkylgroup and a heteroaryl group.

In the present specification, an alkyl group in the alkylamine group,the N-alkylarylamine group and the N-alkylheteroarylamine group is thesame as examples of an alkyl group to describe later.

In the present specification, specific examples of the silyl group mayinclude a trimethylsilyl group, a triethylsilyl group, at-butyldimethylsilyl group, a vinyldimethylsilyl group, apropyldimethylsilyl group, a triphenylsilyl group, a diphenylsilylgroup, a phenylsilyl group and the like, but are not limited thereto.

In the present specification, the alkyl group may be linear or branched,and although not particularly limited thereto, the number of carbonatoms is preferably from 1 to 30. Specific examples thereof may includemethyl, ethyl, propyl, n-propyl, isopropyl, butyl, n-butyl, isobutyl,tert-butyl, sec-butyl, 1-methyl-butyl, 1-ethyl-butyl, pentyl, n-pentyl,isopentyl, neopentyl, tert-pentyl, hexyl, n-hexyl, 1-methylpentyl,2-methyl pentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl,heptyl, n-heptyl, 1-methylhexyl, cyclopentylmethyl, cyclohexylmethyl,octyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl,2-propylpentyl, n-nonyl, 2,2-dimethylheptyl, 1-ethyl-propyl,1,1-dimethyl-propyl, isohexyl, 4-methylhexyl, 5-methylhexyl and thelike, but are not limited thereto.

In the present specification, the cycloalkyl group is not particularlylimited, but preferably has 3 to 30 carbon atoms, and specific examplesthereof may include cyclopropyl, cyclobutyl, cyclopentyl,3-methylcyclopentyl, 2,3-dimethylcyclopentyl, cyclohexyl,3-methylcyclohexyl, 4-methylcyclohexyl, 2,3-dimethylcyclohexyl,3,4,5-trimethylcyclohexyl, 4-tert-butylcyclohexyl, cycloheptyl,cyclooctyl and the like, but are not limited thereto.

In the present specification, the haloalkyl group represents an alkylgroup in which one or more hydrogen atoms of the alkyl group arereplaced by the same or a different halogen group. The haloalkyl groupmay be linear or branched, and although not particularly limitedthereto, the number of carbon atoms is preferably from 1 to 10. Specificexamples thereof may include —CH₂Cl, —CF₃, —CH₂CF₃, —CF₂CF₃ and thelike, but are not limited thereto.

In the present specification, the alkoxy group may be linear, branchedor cyclic. The number of carbon atoms of the alkoxy group is notparticularly limited, but is preferably from 1 to 30.

In the present specification, the alkenyl group may be linear orbranched, and although not particularly limited thereto, the number ofcarbon atoms is preferably from 2 to 30.

In the present specification, the alkynyl group may be linear orbranched, and although not particularly limited thereto, the number ofcarbon atoms is preferably from 2 to 30. Specific examples thereof mayinclude alkynyl groups such as ethynyl, propynyl, 2-methyl-2-propynyl,2-butynyl, 2-pentynyl and the like, but are not limited thereto.

In the present specification, the aryl group is not particularlylimited, but preferably has 6 to 30 carbon atoms, and the aryl group maybe monocyclic or polycyclic.

When the aryl group is a monocyclic aryl group, the number of carbonatoms is not particularly limited, but is preferably from 6 to 30.Specific examples of the monocyclic aryl group may include a phenylgroup, a biphenyl group, a terphenyl group and the like, but are notlimited thereto.

When the aryl group is a polycyclic aryl group, the number of carbonatoms is not particularly limited, but is preferably from 10 to 30.Specific examples of the polycyclic aryl group may include a naphthylgroup, an anthracenyl group, a phenanthryl group, a triphenyl group, apyrenyl group, a perylenyl group, a chrysenyl group, a fluorenyl groupand the like, but are not limited thereto.

In the present specification, the fluorenyl group may be substituted,and adjacent groups may bond to each other to form a ring.

When the fluorenyl group is substituted, and the like may be included.However, the structure is not limited thereto.

In the present specification, the heterocyclic group is a groupincluding one or more atoms that are not carbon, that is, heteroatoms,and specifically, the heteroatom may include one or more atoms selectedfrom the group consisting of O, N, Se, S and the like. The number ofcarbon atoms is not particularly limited, but is preferably from 2 to30, and the heterocyclic group may be monocyclic or polycyclic. Examplesof the heterocyclic group may include a thiophenyl group, a furanylgroup, a pyrrole group, an imidazolyl group, a thiazolyl group, anoxazolyl group, an oxadiazolyl group, a pyridyl group, a bipyridylgroup, a pyrimidyl group, a triazinyl group, a triazolyl group, anacridyl group, a pyridazinyl group, a pyrazinyl group, a quinolinylgroup, a quinazolinyl group, a quinoxalinyl group, a phthalazinyl group,a pyridopyrimidyl group, a pyridopyrazinyl group, a pyrazinopyrazinylgroup, an isoquinolinyl group, an indolyl group, a carbazolyl group, abenzoxazolyl group, a benzimidazolyl group, a benzothiazolyl group, abenzocarbazolyl group, a benzothiophenyl group, a dibenzothiophenylgroup, a benzofuranyl group, a phenanthrolinyl group, a thiazolyl group,an isoxazolyl group, an oxadiazolyl group, a thiadiazolyl group, aphenothiazinyl group, a dibenzofuranyl group and the like, but are notlimited thereto.

In the present specification, descriptions on the heterocyclic group maybe applied to the heteroaryl group except that it is an aromaticheterocyclic group.

In one embodiment of the present specification, Chemical Formula 1 maybe represented by the following Chemical Formula 2.

In Chemical Formula 2,

A1 to A4, X1, X2, R1, R3, R5, R6, L1, L3, L5, L6, I1, I3, I5 and I6 havethe same definitions as in Chemical Formula 1.

In one embodiment of the present specification, Chemical Formula 1 maybe represented by the following Chemical Formula 3.

In Chemical Formula 3,

X1, X2, R1, R3, R5, R6, L1, L3, L5, L6, I1, I3, I5 and I6 have the samedefinitions as in Chemical Formula 1, and B1 to B20 are eachindependently hydrogen, a substituted or unsubstituted alkoxy group, asubstituted or unsubstituted alkyl group, or a substituted orunsubstituted phenyl group.

In one embodiment of the present specification, Chemical Formula 1 maybe represented by any one of the following Chemical Formulae 4 to 7.

In Chemical Formulae 4 to 7,

A1 to A4, R1, R5, L1, L3, L5, L6, I1, I3, I5 and I6 have the samedefinitions as in Chemical Formula 1,

R10 and R11 are each independently a hydroxyl group, a halogen group, asubstituted or unsubstituted cycloalkyl group, a substituted orunsubstituted alkoxy group, a substituted or unsubstituted amine group,a substituted or unsubstituted aryl group, or a substituted orunsubstituted heterocyclic group,

R13 and R14 are each independently hydrogen, a substituted orunsubstituted alkyl group, a substituted or unsubstituted cycloalkylgroup, a substituted or unsubstituted aryl group, or a substituted orunsubstituted heterocyclic group,

R15 and R16 are each independently a hydroxyl group, a halogen group, asubstituted or unsubstituted alkyl group, a substituted or unsubstitutedcycloalkyl group, a substituted or unsubstituted alkoxy group, asubstituted or unsubstituted amine group, a substituted or unsubstitutedaryl group, or a substituted or unsubstituted heterocyclic group, and

R17 and R18 are each independently hydrogen, or a substituted orunsubstituted alkyl group.

In one embodiment of the present specification, R1, R2, R4 and R5 areeach independently hydrogen, a hydroxyl group, a substituted orunsubstituted alkyl group, a substituted or unsubstituted cycloalkylgroup, a substituted or unsubstituted alkoxy group, a substituted orunsubstituted aryl group, or a substituted or unsubstituted heterocyclicgroup.

In one embodiment of the present specification, R1, R2, R4 and R5 areeach independently hydrogen, a hydroxyl group, an alkyl group, ahaloalkyl group, a cycloalkyl group, an alkoxy group, an aryl group or aheterocyclic group.

In one embodiment of the present specification, R1, R2, R4 and R5 areeach independently hydrogen, a hydroxyl group, an alkyl group, ahaloalkyl group, a cyclopentyl group unsubstituted or substituted withan alkyl group, a cyclohexyl group unsubstituted or substituted with analkyl group, a cycloheptyl group unsubstituted or substituted with analkyl group, an alkoxy group unsubstituted or substituted with an alkylgroup, a phenyl group unsubstituted or substituted with a group selectedfrom the group consisting of an alkyl group and a hydroxyl group, anaphthyl group unsubstituted or substituted with an alkyl group, afuranyl group unsubstituted or substituted with an alkyl group, athiophenyl group unsubstituted or substituted with an alkyl group, adibenzofuranyl group unsubstituted or substituted with an alkyl group, apyridyl group unsubstituted or substituted with an alkyl group, animidazolyl group unsubstituted or substituted with an alkyl group, anindolyl group unsubstituted or substituted with an alkyl group, or aquinolinyl group unsubstituted or substituted with an alkyl group.

In one embodiment of the present specification, R1, R2, R4 and R5 areeach independently hydrogen, a hydroxyl group, an alkyl group, ahaloalkyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptylgroup, an alkoxy group, a phenyl group unsubstituted or substituted witha hydroxyl group, a naphthyl group, a furanyl group, a thiophenyl group,a dibenzofuranyl group, a pyridyl group, an imidazolyl group, an indolylgroup or a quinolinyl group.

In one embodiment of the present specification, L1, L2, L4 and L5 areeach independently a direct bond, S, or a substituted or unsubstitutedalkylene group.

In one embodiment of the present specification, L1, L2, L4 and L5 areeach independently a direct bond, S, or a linear or branched alkylenegroup.

In one embodiment of the present specification, R3 and R6 are eachindependently a hydroxyl group, a halogen group, a substituted orunsubstituted alkyl group, a substituted or unsubstituted cycloalkylgroup, a substituted or unsubstituted alkoxy group, a substituted orunsubstituted amine group, a substituted or unsubstituted aryl group, ora substituted or unsubstituted heterocyclic group.

In one embodiment of the present specification, R3 and R6 are eachindependently a hydroxyl group, a halogen group, an alkyl group, ahaloalkyl group, a substituted or unsubstituted cyclopentyl group, asubstituted or unsubstituted cyclohexyl group, a substituted orunsubstituted alkoxy group, a substituted or unsubstituted alkylaminegroup, a substituted or unsubstituted dialkylamine group, a substitutedor unsubstituted phenyl group, a substituted or unsubstituted naphthylgroup, a substituted or unsubstituted pyridyl group, a substituted orunsubstituted thiophenyl group, a substituted or unsubstituted furanylgroup, a substituted or unsubstituted dibenzothiophenyl group, or asubstituted or unsubstituted dibenzofuranyl group.

In one embodiment of the present specification, L3 and L6 are eachindependently a direct bond, a substituted or unsubstituted alkylenegroup, or a substituted or unsubstituted arylene group.

In one embodiment of the present specification, L3 and L6 are eachindependently a direct bond, a substituted or unsubstituted linear orbranched alkylene group, or a substituted or unsubstituted phenylenegroup.

In one embodiment of the present specification, when R3 is a substitutedor unsubstituted alkyl group, X1 is NH or NR′. In other words, when R3is a substituted or unsubstituted alkyl group, X1 is not O.

In one embodiment of the present specification, when R6 is a substitutedor unsubstituted alkyl group, X2 is NH or NR′. In other words, when R6is a substituted or unsubstituted alkyl group, X2 is not O.

In one embodiment of the present specification, A1 to A4 are eachindependently a substituted or unsubstituted aryl group, or asubstituted or unsubstituted heteroaryl group.

In one embodiment of the present specification, A1 to A4 are eachindependently a substituted or unsubstituted aryl group.

In one embodiment of the present specification, A1 to A4 are eachindependently a substituted or unsubstituted phenyl group, or asubstituted or unsubstituted biphenyl group.

In one embodiment of the present specification, A1 to A4 are eachindependently a phenyl group unsubstituted or substituted with a groupselected from the group consisting of a substituted or unsubstitutedalkyl group, a substituted or unsubstituted alkoxy group and asubstituted or unsubstituted aryl group.

In one embodiment of the present specification, A1 to A4 are eachindependently a phenyl group unsubstituted or substituted with a groupselected from the group consisting of an alkyl group unsubstituted orsubstituted with an alkoxy group or a hydroxyl group; an alkoxy group;and a phenyl group unsubstituted or substituted with an alkyl group.

In one embodiment of the present specification, A1 to A4 are the same aseach other.

In one embodiment of the present specification, the compound representedby Chemical Formula 1 is point symmetric, line symmetric or surfacesymmetric.

The compound represented by Chemical Formula 1 is represented by any oneof the following compounds.

In the compounds, Ph is a phenyl group.

One embodiment of the present specification provides a photoresistfluorescent resin composition including a binder resin; a polymerizablecompound including an ethylenically unsaturated bond; and the compounddescribed above.

A content of the compound may be from 0.005% by weight to 70% by weightbased on a total solid weight of the photoresist fluorescent resincomposition, but is not limited thereto.

A content of the compound may be from 0.001% by weight to 15% by weightbased on a total weight of the photoresist fluorescent resincomposition, but is not limited thereto.

The compound may have a maximum absorption wavelength (Amax) of 570 nmto 590 nm, and specifically 580 nm to 590 nm.

As the binder resin, a copolymer resin of a monomer providing mechanicalstrength and a monomer providing alkali solubility may be used.

The monomer providing mechanical strength of the film may be any one ormore of unsaturated carboxylic acid esters; aromatic vinyls; unsaturatedethers; unsaturated imides; and acid anhydrides.

Specific examples of the unsaturated carboxylic acid esters may beselected from the group consisting of benzyl (meth)acrylate, methyl(meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate,dimethylaminoethyl (meth)acrylate, isobutyl (meth)acrylate, t-butyl(meth)acrylate, cyclohexyl (meth)acrylate, isobornyl (meth)acrylate,ethylhexyl (meth)acrylate, 2-phenoxyethyl (meth)acrylate,tetrahydrofurfuryl (meth)acrylate, hydroxyethyl (meth)acrylate,2-hydroxypropyl (meth)acrylate, 2-hydroxy-3-chloropropyl (meth)acrylate,4-hydroxybutyl (meth)acrylate, acyloctyloxy-2-hydroxypropyl(meth)acrylate, glycerol (meth)acrylate, 2-methoxyethyl (meth)acrylate,3-methoxybutyl (meth)acrylate, ethoxy diethylene glycol (meth)acrylate,methoxy triethylene glycol (meth)acrylate, methoxy tripropylene glycol(meth)acrylate, poly(ethylene glycol)methyl ether (meth)acrylate,phenoxy diethylene glycol (meth)acrylate, p-nonylphenoxy polyethyleneglycol (meth)acrylate, p-nonylphenoxy polypropylene glycol(meth)acrylate, glycidyl (meth)acrylate, tetrafluoropropyl(meth)acrylate, 1,1,1,3,3,3-hexafluoroisopropyl (meth)acrylate,octafluoropentyl (meth)acrylate, heptadecafluorodecyl (meth)acrylate,tribromophenyl (meth)acrylate, methyl α-hydroxymethyl acrylate, ethylα-hydroxymethyl acrylate, propyl α-hydroxymethyl acrylate and butylα-hydroxymethyl acrylate, but are not limited thereto.

Specific examples of the aromatic vinyls may be selected from the groupconsisting of styrene, α-methylstyrene, (o,m,p)-vinyl toluene,(o,m,p)-methoxystyrene and (o,m,p)-chlorostyrene, but are not limitedthereto.

Specific examples of the unsaturated ethers may be selected from thegroup consisting of vinyl methyl ether, vinyl ethyl ether and allylglycidyl ether, but are not limited thereto.

Specific examples of the unsaturated imides may be selected from thegroup consisting of N-phenylmaleimide, N-(4-chlorophenyl)maleimide,N-(4-hydroxyphenyl)maleimide and N-cyclohexylmaleimide, but are notlimited thereto.

Specific examples of the acid anhydride may include maleic anhydride,methyl maleic anhydride, tetrahydrophthalic anhydride and the like, butare not limited thereto.

The monomer providing alkali solubility may be a monomer containing anacid group. The monomer containing an acid group may use one or moretypes selected from the group consisting of (meth)acrylic acid, crotonicacid, itaconic acid, maleic acid, fumaric acid, monomethyl maleic acid,isoprenesulfonic acid, styrenesulfonic acid, 5-norbornene-2-carboxylicacid and the like, but is not limited thereto.

A content of the binder resin may be greater than or equal to 1% byweight and less than or equal to 60% by weight based on a total solidweight of the photoresist fluorescent resin composition, but is notlimited thereto.

A content of the binder resin may be greater than or equal to 1% byweight and less than or equal to 30% by weight based on a total weightof the photoresist fluorescent resin composition, but is not limitedthereto.

The binder resin may have an acid value of greater than or equal to 50KOH mg/g and less than or equal to 130 KOH mg/g, and a weight averagemolecular weight of greater than or equal to 1,000 g/mol and less thanor equal to 40,000 g/mol, however, the acid value and the weight averagemolecular weight are not limited thereto.

The multifunctional monomer means a compound having two or morepolymerizable functional groups, and acts as a crosslinking agent in thephotoresist fluorescent resin composition. Herein, the polymerizablefunctional group is not particularly limited as long as it is capable ofpolymerization, and examples thereof may include an ethylenicallyunsaturated group, a siloxane group, a hydroxyl group, an epoxy groupand the like. Specifically, the multifunctional monomer may include anethylenically unsaturated bond.

The multifunctional monomer may be one or more types selected from amongethylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylatehaving 2 to 14 ethylene groups, trimethylolpropane di(meth)acrylate,trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate,pentaerythritol tetra(meth)acrylate, propylene glycol di(meth)acrylatehaving 2 to 14 propylene groups, dipentaerythritol penta(meth)acrylateand dipentaerythritol hexa(meth)acrylate, but is not limited thereto.

A content of the multifunctional monomer may be from 1% by weight to 60%by weight based on a total solid weight of the photoresist fluorescentresin composition, but is not limited thereto.

A content of the multifunctional monomer may be from 1% by weight to 30%by weight based on a total weight of the photoresist fluorescent resincomposition, but is not limited thereto. The photoresist fluorescentresin composition may further include a photoinitiator.

In the photoresist fluorescent resin composition according to thepresent disclosure, the photoinitiator may be any one or more selectedfrom among acetophenone-based compounds; biimidazole-based compounds;triazine-based compounds; and oxime-based compounds.

Examples of the acetophenone-based compound may include2-hydroxy-2-methyl-1-phenyl propa n-1-one,1-(4-isopropylphenyl)-2-hydroxy-2-methylpropan-1-one,4-(2-hydroxyethoxy)-phenyl-(2-hydroxy-2-propyl)ketone,1-hydroxycyclohexylphenyl ketone, benzoin methyl ether, benzoin ethylether, benzoin isobutyl ether, benzoin butyl ether,2,2-dimethoxy-2-phenylacetophenone,2-methyl-(4-methylthio)phenyl-2-morpholino-1-propan-1-one,2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butan-1-one,2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one or the like,but are not limited thereto.

Examples of the biimidazole-based compound may include2,2′-bis(2-chlorophenyl)-4,4′,5,5′-tetraphenyl biimidazole,2,2′-bis(o-chlorophenyl)-4,4′,5,5′-tetrakis(3,4,5-trimethoxyphenyl)-1,2′-biimidazole,2,2′-bis(2,3-dichlorophenyl)-4,4′,5,5′-tetra phenyl biimidazole,2,2′-bis(o-chlorophenyl)-4,4′,5,5′-tetraphenyl-1,2′-biimidazole or thelike, but are not limited thereto.

Examples of the triazine-based compound may include3-{4-[2,4-bis(trichloromethyl)-s-triazin-6-yl]phenylthio}propionic acid,1,1,1,3,3,3-hexafluoroisopropyl-3-{4-[2,4-bis(trichloromethyl)-s-triazin-6-yl]phenylthio}propionate,ethyl-2-{4-[2,4-bis(trichloromethyl)-s-triazin-6-yl]phenylthio}acetate,2-epoxyethyl-2-{4-[2,4-bis(trichloromethyl)-s-triazin-6-yl]phenylthio}acetate,cyclohexyl-2-{4-[2,4-bis(trichloromethyl)-s-triazin-6-yl]phenylthio}acetate,benzyl-2-{4-[2,4-bis(trichloromethyl)-s-triazin-6-yl]phenylthio}acetate,3-{chloro-[42,4-bis(trichloromethyl)-s-triazin-6-yl]phenylthio}propionicacid,3-{4-[2,4-bis(trichloromethyl)-s-triazin-6-yl]phenylthio}propionamide,2,4-bis(trichloromethyl)-6-p-methoxystyryl-s-triazine,2,4-bis(trichloromethyl)-6-(1-p-dimethylaminophenyl)-1,3-butadienyl-s-triazine,2-trichloromethyl-4-amino-6-p-methoxystyryl-s-triazine or the like, butare not limited thereto.

Examples of the oxime-based compound may include CGI-242, CGI-124 ofCiba Specialty Chemicals, and the like, but are not limited thereto.

A content of the photoinitiator may be from 0.1% by weight to 20% byweight based on a total solid content of the photoresist fluorescentresin composition, but is not limited thereto.

A content of the photoinitiator may be from 0.1% by weight to 15% byweight based on a total weight of the photoresist fluorescent resincomposition, but is not limited thereto.

The photoresist fluorescent resin composition may further include asolvent.

The photoresist fluorescent resin composition according to oneembodiment of the present disclosure may further include a solvent.

The solvent may be one or more types selected from the group consistingof acetone, methyl ethyl ketone, methyl isobutyl ketone, methylcellosolve, ethyl cellosolve, tetrahydrofuran, 1,4-dioxane, ethyleneglycol dimethyl ether, ethylene glycol diethyl ether, propylene glycoldimethyl ether, propylene glycol diethyl ether, diethylene glycoldimethyl ether, diethylene glycol diethyl ether, diethylene glycolmethylethyl ether, chloroform, methylene chloride, 1,2-dichloroethane,1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,1,2-trichloroethene,hexane, heptane, octane, cyclohexane, benzene, toluene, xylene,methanol, ethanol, isopropanol, propanol, butanol, t-butanol,2-ethoxypropanol, 2-methoxypropanol, 3-methoxybutanol, cyclohexanone,cyclopentanone, propylene glycol methyl ether acetate, propylene glycolethyl ether acetate, 3-methoxybutyl acetate, ethyl 3-ethoxypropionate,ethyl cellosolve acetate, methyl cellosolve acetate, butyl acetate,propylene glycol monomethyl ether and dipropylene glycol monomethylether, but is not limited thereto.

A content of the total solid may be from 10% by weight to 50% by weight,and a content of the solvent may be from 50% by weight to 90% by weightbased on a total weight of the photoresist fluorescent resincomposition, however, the content is not limited thereto.

The photoresist composition according to one embodiment of the presentdisclosure may further include one or more types of additives selectedfrom the group consisting of a dispersant, a curing accelerator, athermal polymerization inhibitor, a surfactant, a photosensitizer, aplasticizer, an adhesion promoter, a filler and an adhesion aid.

As the photosensitizer, the plasticizer, the adhesion promoter, thefiller and the like, all compounds that may be included in existingphotoresist fluorescent resin compositions may be used.

The additives may be each independently included in 0.01% by weight to5% by weight based on a total weight of the photoresist fluorescentresin composition, however, each content is not limited thereto.

The additives may be each independently included in 0.01% by weight to5% by weight based on a total solid weight of the photoresistfluorescent resin composition, however, each content is not limitedthereto.

One embodiment of the present specification provides a color conversionfilm prepared using the photoresist fluorescent resin compositiondescribed above.

More specifically, a thin-film type photoresist material is formed bycoating the photoresist fluorescent resin composition of the presentdisclosure on a substrate using a proper method.

The coating method is not particularly limited, and a spray method, aroll coating method, a spin coating method and the like may be used, anda spin coating method is generally widely used. In addition, afterforming the coated film, some of the residual solvent may be removedunder vacuum in some cases.

Examples of a light source for curing the photoresist fluorescent resincomposition according to the present disclosure include mercury vaporarc, carbon arc, Xe arc, which emit light with a wavelength of 250 nm to450 nm, and the like, but are not limited thereto.

The color conversion film of the present specification has a maximumemission peak in a 610 nm to 640 nm region, and specifically, has amaximum emission peak in a 615 nm to 640 nm region and preferably in a620 nm to 640 nm region. In this case, an advantage of high colorreproduction is obtained.

In the color conversion film of the present specification, the maximumemission peak may have a full width at half maximum of 41 nm or less,and specifically greater than or equal to 35 nm and less than or equalto 41 nm. The full width at half maximum means, when converting lightabsorbed from an external light source to light having anotherwavelength and emitting the light, a width of the emission peak at halfthe maximum height in the maximum emission peak of the emitted light,and color gamut is excellent as the full width at half maximum issmaller.

The color conversion film may further include additional fluorescentmaterials in addition to the compound represented by Chemical Formula 1.When using a light source emitting blue light, the color conversion filmpreferably includes both a green light emitting fluorescent material anda red light emitting fluorescent material. In addition, when using alight source emitting blue light and green light, the color conversionfilm may only include a red light emitting fluorescent material.However, the color conversion film is not limited thereto, and even whenusing a light source emitting blue light, the color conversion film mayonly include a red light emitting compound when a separate filmincluding a green light emitting fluorescent material is laminated. Onthe other hand, even when using a light source emitting blue light, thecolor conversion film may only include a green light emitting compoundwhen a separate film including a red light emitting fluorescent materialis laminated.

The color conversion film may further include an additional layerincluding a resin matrix; and a compound dispersed into the resin matrixand emitting light in a wavelength different from the wavelength of thecompound represented by Chemical Formula 1. The compound emitting lightin a wavelength different from the wavelength of the compoundrepresented by Chemical Formula 1 may also be the compound representedby Chemical Formula 1, or may be other known fluorescent materials.

The resin matrix material is preferably a thermoplastic polymer or athermocurable polymer. Specifically, a poly(meth)acryl-based such aspolymethyl methacrylate (PMMA), a polycarbonate (PC)-based, apolystyrene (PS)-based, a polyarylene (PAR)-based, a polyurethane(PU)-based, a styrene-acrylonitrile (SAN)-based, a polyvinylidenefluoride (PVDF)-based, a modified polyvinylidene fluoride(modified-PVDF)-based and the like may be used as the resin matrixmaterial.

According to one embodiment of the present specification, the colorconversion film according to the embodiments described aboveadditionally includes light diffusing particles. By dispersing lightdiffusing particles into the color conversion film instead of a lightdiffusing film used in the art for enhancing luminance, higher luminancemay be exhibited compared to using a separate light diffusing film, andan adhering process may be skipped as well.

As the light diffusing particles, particles having a high refractiveindex with the resin matrix may be used, and examples thereof mayinclude TiO₂, silica, borosilicate, alumina, sapphire, air or othergas-filled hollow beads or particles (for example, air/gas-filled glassor polymers); polystyrene, polycarbonate, polymethyl methacrylate,acryl, methyl methacrylate, styrene, a melamine resin, a formaldehyderesin, or polymer particles including melamine and formaldehyde resins;or any suitable combination thereof.

The light diffusing particles may have particle diameters in a range of0.1 μm to 5 μm, for example, in a range of 0.3 μm to 1 μm. The contentof the light diffusing particles may be determined as necessary.

The color conversion film according to the embodiments described abovemay have a thickness of 2 μm to 200 μm. Particularly, the colorconversion film may exhibit high luminance even with a small thicknessof 2 μm to 20 μm. This is due to the fact that the content of thefluorescent material molecules included in the unit volume is highercompared to quantum dots.

The color conversion film according to the embodiments described abovemay have a substrate provided on one surface. This substrate mayfunction as a support when preparing the color conversion film. Types ofthe substrate are not particularly limited, and the material orthickness is not limited as long as it is transparent and is capable offunctioning as the support. Herein, being transparent means havingvisible light transmittance of 70% or higher. For example, a PET filmmay be used as the substrate.

One embodiment of the present specification provides a backlight unitincluding the color conversion film. The backlight unit may havebacklight unit constitutions known in the art except for including thecolor conversion film. FIG. 1 illustrates a mimetic diagram of abacklight unit structure according to one embodiment. According to FIG.1 , the color conversion film including the compound represented byChemical Formula 1 is provided on a surface opposite to a surface facinga reflecting plate of a light guide plate. FIG. 1 illustrates aconstitution including a light source and a reflecting plate surroundingthe light source, however, the constitution is not limited to such astructure, and may vary depending on the backlight unit structure knownin the art. In addition, as the light source, a direct type as well as aside chain type may be used, and the reflecting plate or the reflectivelayer may not be included or may be replaced with other constituents asnecessary, and as necessary, additional films such as a light diffusingfilm, a light concentrating film and a luminance enhancing film may befurther provided. Preferably, a prism sheet, a multilayer reflectivepolarizer film, a light concentrating film or a luminance enhancing filmis further provided on the color conversion film.

In the constitution of the backlight unit as in FIG. 1 , a scatteringpattern may be provided as necessary on an upper surface or a lowersurface of the light guide plate. Light introduced into the light guideplate has non-uniform light distribution due to repetition of opticalprocesses such as reflection, total reflection, refraction ortransmission, and the scattering pattern may be used to induce thenon-uniform light distribution to uniform brightness.

One embodiment of the present specification provides a display apparatusincluding the backlight unit. The display apparatus is not particularlylimited as long as it includes the backlight unit. For example, thedisplay apparatus includes a display module and a backlight unit. FIG. 2illustrates a structure of the display apparatus. However, the structureis not limited thereto, and between the display module and the backlightunit, additional films such as a light diffusing film, a lightconcentrating film and a luminance enhancing film may be furtherprovided as necessary.

Hereinafter, the present specification will be described in more detailwith reference to examples. However, the following examples are forillustrative purposes only, and are not to limit the presentspecification.

The compound according to one embodiment of the present specificationmay be prepared using preparation methods to describe later.

For example, the core structure of the compound having the structure ofChemical Formula 1 may be prepared through the following ReactionFormula 1. Substituents may bond using methods known in the art, andtypes, positions or the number of the substituents may vary depending ontechnologies known in the art.

Herein, A1 to A4, L1, I1, L2, I2, L4, I4, L5, I5, R1, R2, R4 and R5 havethe same definitions as in Chemical Formula 1, and X3, L7, I7 and E2have the same definitions as in the following Chemical Formula 8.

After dissolving 1 equivalent of Compound 1 and a catalytic amount ofdimethylformamide (DMF) in a dichloromethane (DCM) solvent in a reactioncontainer, 4 equivalents of oxalyl chloride was slowly introducedthereto in an ice bath. The result was stirred at room temperature undernitrogen. Then, dichloromethane was evaporated using a rotaryevaporator. An acyl chloride in which a hydroxyl group is replaced witha chlorine group in the carboxyl group of Compound 1 was synthesized.

After dissolving 4 equivalents of a compound represented by thefollowing Chemical Formula 8 and 10 equivalents of triethylamine (TEA)in a dichloromethane solvent in another reaction container, thesynthesized acyl chloride dissolved in dichloromethane was slowlyintroduced thereto in an ice bath. The mixture was stirred at roomtemperature under nitrogen. After the reaction was completed, the resultwas extracted using dichloromethane and water, and water was removedfrom the separated organic layer using anhydrous magnesium sulfate(MgSO₄). The water-removed organic layer was concentrated through vacuumdistillation, and then recrystallized using dichloromethane and hexaneto obtain Compound 2 by suction filtration. Compound 2 was dried under avacuum condition at 80° C.

E1-X3-(L7)_(I7)-E2  [Chemical Formula 8]

In Chemical Formula 8,

X3, L7, I7 and E2 respectively have the same definitions as X1, L3, I3and R3 of Chemical Formula 1, and

E1 is hydrogen.

Example [Preparation Example 1] Synthesis of Compound A

After dissolving 1 equivalent of Compound A-1 and a catalytic amount ofdimethylformamide (DMF) in a dichloromethane (DCM) solvent in a reactioncontainer, 4 equivalents of oxalyl chloride was slowly introducedthereto in an ice bath. The result was stirred at room temperature undernitrogen. Then, dichloromethane was evaporated using a rotaryevaporator. An acyl chloride in which a hydroxyl group is replaced witha chlorine group in the carboxyl group of Compound A-1 was synthesized.

After dissolving 4 equivalents of phenol and 10 equivalents oftriethylamine (TEA) in a dichloromethane solvent in another reactioncontainer, the synthesized acyl chloride dissolved in dichloromethanewas slowly introduced thereto in an ice bath. The mixture was stirred atroom temperature under nitrogen. After the reaction was completed, theresult was extracted using dichloromethane and water, and water wasremoved from the separated organic layer using anhydrous magnesiumsulfate (MgSO₄). The water-removed organic layer was concentratedthrough vacuum distillation, and then recrystallized usingdichloromethane and hexane to obtain Compound A by suction filtration.Compound A was dried under a vacuum condition at 80° C.

HR LC/MS/MS m/z calculated for C86H82N2O12 (M+): 1334.5868; found:1334.5868.

[Preparation Example 2] Synthesis of Compound B

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound B-1 and 1,1,1,3,3,3-hexafluoro-2-propanol were usedinstead of Compound A-1 and phenol, and Compound B was synthesizedtherethrough.

HR LC/MS/MS m/z calculated for C88H74F12N2O12 (M+): 1578.5050; found:1578.5051.

[Preparation Example 3] Synthesis of Compound C

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound C-1 and cyclohexylamine were used instead ofCompound A-1 and phenol, and Compound C was synthesized therethrough.

HR LC/MS/MS m/z calculated for C76H70F6N4O10 (M+):1312.4996; found:1312.4998.

[Preparation Example 4] Synthesis of Compound D

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound D-1 and 4-t-butylphenol were used instead ofCompound A-1 and phenol, and Compound D was synthesized therethrough.

HR LC/MS/MS m/z calculated for C88H86N2O12 (M+):1362.6181; found:1362.6181.

[Preparation Example 5] Synthesis of Compound E

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound E-1 and 2-ethoxyethylamine were used instead ofCompound A-1 and phenol, and Compound E was synthesized therethrough.

HR LC/MS/MS m/z calculated for C62H52N4014 (M+): 1076.3480; found:1076.3485.

[Preparation Example 6] Synthesis of Compound F

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound F-1 and dicyclohexylamine were used instead ofCompound A-1 and phenol, and Compound F was synthesized therethrough.

HR LC/MS/MS m/z calculated for C98H100N4O12 (M+):1524.7338; found:1524.7340.

[Preparation Example 7] Synthesis of Compound G

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound G-1 and dibenzylamine were used instead of CompoundA-1 and phenol, and Compound G was synthesized therethrough.

HR LC/MS/MS m/z calculated for C102H100N4O10 (M+):1540.7439; found:1540.7440.

[Preparation Example 8] Synthesis of Compound H

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound H-1 and t-butylamine were used instead of CompoundA-1 and phenol, and Compound H was synthesized therethrough.

HR LC/MS/MS m/z calculated for C90H92N4O10 (M+):1388.6813; found:1388.6813.

[Preparation Example 9] Synthesis of Compound I

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound I-1 and piperidine were used instead of CompoundA-1 and phenol, and Compound I was synthesized therethrough.

HR LC/MS/MS m/z calculated for C84H92N4O10 (M+):1316.6813; found:1316.6814.

[Preparation Example 10] Synthesis of Compound H

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound H-1 and propylaniline were used instead of CompoundA-1 and phenol, and Compound H was synthesized therethrough.

HR LC/MS/MS m/z calculated for C90H92N4O10 (M+):1388.6813; found:1388.6815.

[Preparation Example 11] Synthesis of Compound K

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound K-1 and diethanolamine were used instead ofCompound A-1 and phenol, and Compound K was synthesized therethrough.

HR LC/MS/MS m/z calculated for C80H80N8O14 (M+):1376.5794; found:1376.5794.

[Preparation Example 12] Synthesis of Compound L

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound L-1 and 4-t-butylaniline were used instead ofCompound A-1 and phenol, and Compound L was synthesized therethrough.

HR LC/MS/MS m/z calculated for C102H100N4O10 (M+): 1540.7439; found:1540.7439.

[Preparation Example 13] Synthesis of Compound M

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound M-1 and dipropylamine were used instead of CompoundA-1 and phenol, and Compound M was synthesized therethrough.

HR LC/MS/MS m/z calculated for C80H72N4O10 (M+):1248.5248; found:1248.5250.

[Preparation Example 14] Synthesis of Compound N

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound N-1 and 1-(2-hydroxyethyl)piperazine were usedinstead of Compound A-1 and phenol, and Compound N was synthesizedtherethrough.

HR LC/MS/MS m/z calculated for C70H66N6O12 (M+): 1182.4739; found:1182.4740.

[Preparation Example 15] Synthesis of Compound 0

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound 0-1 and N-methylpropylamine were used instead ofCompound A-1 and phenol, and Compound 0 was synthesized therethrough.

HR LC/MS/MS m/z calculated for C90H86N6O10 (M+):1410.6405; found:1410.6401.

[Comparative Preparation Example 1] Synthesis of Compound P

After dissolving 1 equivalent of Compound P-1, 8 equivalents of phenoland 6 equivalents of potassium carbonate in a methylpyrrolidone (NMP)solvent in a reaction container, the result was stirred at 110° C. Afterthe reaction was completed, a compound was obtained using water and thensuction filtration. The obtained compound was extracted usingdichloromethane and water, and then water was removed from the separatedorganic layer using anhydrous magnesium sulfate. The water-removedorganic layer was concentrated through vacuum distillation, and thenrecrystallized using dichloromethane and ethanol to obtain Compound P bysuction filtration. Compound P was dried under a vacuum condition at 80°C.

HR LC/MS/MS m/z calculated for C52H30N2O12 (M+): 874.1799; found:874.1799.

[Comparative Preparation Example 2] Synthesis of Compound Q

Synthesis was conducted in the same manner as in Comparative PreparationExample 1 except that Compound Q-1 was used instead of Compound P-1, andCompound Q was synthesized therethrough.

HR LC/MS/MS m/z calculated for C72H58N2O8 (M+): 1078.4193; found:1078.4195.

[Comparative Preparation Example 3] Synthesis of Compound R

Synthesis was conducted in the same manner as in Preparation Example 1except that Compound R-1 and ethanol were used instead of Compound A-1and phenol, and Compound R was synthesized therethrough.

HR LC/MS/MS m/z calculated for C60H46N2O12 (M+): 986.3051; found:986.3051.

Example 1

A solution was prepared by dissolving 1.5 parts by weight of Compound A(maximum absorption wavelength 583 nm and maximum emission wavelength612 nm in toluene solution) prepared in Preparation Example 1, 33.9parts by weight of an acryl-based binder (VS12A80, LG Chem.), 59.3 partsby weight of a multifunctional monomer (pentaerythritol triacrylate,Nippon Kayaku), 2.3 parts by weight of an adhesive aid and surfactant(KBM 503, Shinetsu) and 3.0 parts by weight of a photoinitiator(Tinuvin® 477, BASF) in a propylene glycol monomethyl ether acetate(PGMEA) solvent so that the solid content became 21% by weight. Themixed solution was sufficiently stirred, and coated as a thin film on aglass substrate, and then dried to prepare a color conversion film.

Herein, a to g are each independently the number of repeating units inthe parentheses, and for example, a tog are each independently aninteger of 2 to 10,000.

Example 2

Preparation was made in the same manner as in Example 1 except thatCompound B (maximum absorption wavelength 586 nm and maximum emissionwavelength 615 nm in toluene solution) was used instead of Compound A.

Example 3

Preparation was made in the same manner as in Example 1 except thatCompound D (maximum absorption wavelength 584 nm and maximum emissionwavelength 616 nm in toluene solution) was used instead of Compound A.

Example 4

Preparation was made in the same manner as in Example 1 except thatCompound G (maximum absorption wavelength 585 nm and maximum emissionwavelength 614 nm in toluene solution) was used instead of Compound A.

Example 5

Preparation was made in the same manner as in Example 1 except thatCompound H (maximum absorption wavelength 580 nm and maximum emissionwavelength 611 nm in toluene solution) was used instead of Compound A.

Example 6

Preparation was made in the same manner as in Example 1 except thatCompound I (maximum absorption wavelength 583 nm and maximum emissionwavelength 612 nm in toluene solution) was used instead of Compound A.

Example 7

Preparation was made in the same manner as in Example 1 except thatCompound M (maximum absorption wavelength 581 nm and maximum emissionwavelength 610 nm in toluene solution) was used instead of Compound A.

Comparative Example 1

Preparation was made in the same manner as in Example 1 except thatCompound P (maximum absorption wavelength 576 nm and maximum emissionwavelength 606 nm in toluene solution) was used instead of Compound A.

Comparative Example 2

Preparation was made in the same manner as in Example 1 except thatCompound Q (maximum absorption wavelength 572 nm and maximum emissionwavelength 601 nm in toluene solution) was used instead of Compound A.

Comparative Example 3

Preparation was made in the same manner as in Example 1 except thatCompound R (maximum absorption wavelength 573 nm and maximum emissionwavelength 605 nm in toluene solution) was used instead of Compound A.

Experimental Example 1

1) Measurement of Absorption and Emission Spectra in Film State

A luminance spectrum of each of the color conversion films prepared inExamples 1 to 7 and Comparative Examples 1 to 3 was measured using aspectroradiometer (SR series of TOPCON Corporation). Specifically, theprepared color conversion film was laminated on one surface of a lightguide plate of a backlight unit including an LED blue backlight (maximumemission wavelength 450 nm) and the light guide plate, and afterlaminating a prism sheet and a double brightness enhance film (DBEF) onthe color conversion film, an initial value was set so that thebrightness of the blue LED light was 600 nit based on the film.

2) Measurement of Absorption and Emission Spectra in Solution State

In order to measure absorption and emission wavelengths, the sample wasdissolved to a concentration of 10⁻⁵ M using toluene as a solvent, andabsorption and emission spectra thereof were measured.

Properties of the compounds used in Examples 1 to 7 and ComparativeExamples 1 to 3 in the solution, and absorption and emission wavelengthsin the thin film when used in the color conversion film are as shown inTable 1.

TABLE 1 Solution Film Example Compound λ_(max) (UV) λ_(max) (PL) λ_(max)(UV) λ_(max) (PL) 1 A 583 612 585 626 2 B 586 615 587 627 3 D 584 616586 629 4 G 585 614 590 627 5 H 580 611 583 625 6 I 583 612 585 625 7 M581 610 584 621 Comparative P 576 606 578 616 Example 1 Comparative Q572 601 575 612 Example 2 Comparative R 573 605 578 615 Example 3

Through Table 1, it was seen that the compound according to thedisclosure of the present application had longer absorption and emissionwavelengths in the solution and in the thin film compared to thecomparative examples.

1. A compound represented by the following Chemical Formula 1:

wherein, in Chemical Formula 1, A1 to A4 are each independently asubstituted or unsubstituted aryl group, or a substituted orunsubstituted heterocyclic group; X1 and X2 are each independently O, NHor NR′; R′ is a substituted or unsubstituted alkyl group, a substitutedor unsubstituted cycloalkyl group, a substituted or unsubstituted arylgroup, or a substituted or unsubstituted heterocyclic group, or bonds toadjacent groups to form a ring; R1, R2, R4 and R5 are each independentlyhydrogen, a hydroxyl group, a substituted or unsubstituted alkyl group,a substituted or unsubstituted cycloalkyl group, a substituted orunsubstituted alkoxy group, a substituted or unsubstituted aryl group,or a substituted or unsubstituted heterocyclic group; R3 and R6 are eachindependently a hydroxyl group, a halogen group, a substituted orunsubstituted alkyl group, a substituted or unsubstituted cycloalkylgroup, a substituted or unsubstituted alkoxy group, a substituted orunsubstituted amine group, a substituted or unsubstituted aryl group, ora substituted or unsubstituted heterocyclic group; L1, L2, L4 and L5 areeach independently a direct bond, S, or a substituted or unsubstitutedalkylene group; L3 and L6 are each independently a direct bond, asubstituted or unsubstituted alkylene group, or a substituted orunsubstituted arylene group; when R3 is a substituted or unsubstitutedalkyl group, X1 is NH or NR′; when R6 is a substituted or unsubstitutedalkyl group, X2 is NH or NR′; I1 to I6 are each 1 or 2; and when I1 toI6 are each 2, structures in the parentheses are the same as ordifferent from each other.
 2. The compound of claim 1, wherein ChemicalFormula 1 is represented by the following Chemical Formula 2:

in Chemical Formula 2, A1 to A4, X1, X2, R1, R3, R5, R6, L1, L3, L5, L6,I1, I3, I5 and I6 have the same definitions as in Chemical Formula
 1. 3.The compound of claim 1, wherein Chemical Formula 1 is represented bythe following Chemical Formula 3:

in Chemical Formula 3, X1, X2, R1, R3, R5, R6, L1, L3, L5, L6, I1, I3,I5 and I6 have the same definitions as in Chemical Formula 1; and B1 toB20 are each independently hydrogen, a substituted or unsubstitutedalkoxy group, a substituted or unsubstituted alkyl group, or asubstituted or unsubstituted phenyl group.
 4. The compound of claim 1,wherein Chemical Formula 1 is represented by any one of the followingChemical Formulae 4 to 7:

in Chemical Formulae 4 to 7, A1 to A4, R1, R5, L1, L3, L5, L6, I1, I3,I5 and I6 have the same definitions as in Chemical Formula 1; R10 andR11 are each independently a hydroxyl group, a halogen group, asubstituted or unsubstituted cycloalkyl group, a substituted orunsubstituted alkoxy group, a substituted or unsubstituted amine group,a substituted or unsubstituted aryl group, or a substituted orunsubstituted heterocyclic group; R13 and R14 are each independentlyhydrogen, a substituted or unsubstituted alkyl group, a substituted orunsubstituted cycloalkyl group, a substituted or unsubstituted arylgroup, or a substituted or unsubstituted heterocyclic group; R15 and R16are each independently a hydroxyl group, a halogen group, a substitutedor unsubstituted alkyl group, a substituted or unsubstituted cycloalkylgroup, a substituted or unsubstituted alkoxy group, a substituted orunsubstituted amine group, a substituted or unsubstituted aryl group, ora substituted or unsubstituted heterocyclic group; and R17 and R18 areeach independently hydrogen, or a substituted or unsubstituted alkylgroup.
 5. The compound of claim 1, wherein A1 to A4 are each asubstituted or unsubstituted aryl group.
 6. The compound of claim 1,wherein A1 to A4 are the same.
 7. The compound of claim 1, wherein thecompound represented by Chemical Formula 1 is represented by any one ofthe following compounds:

in the compounds, Ph is a phenyl group.
 8. A photoresist fluorescentresin composition comprising: a binder resin; a polymerizable compoundincluding an ethylenically unsaturated bond; and the compound of any oneof claims 1 to
 7. 9. A color conversion film comprising a cured materialof the photoresist fluorescent resin composition of claim
 8. 10. Abacklight unit comprising the color conversion film of claim
 9. 11. Adisplay apparatus comprising the backlight unit of claim 10.